Abstract
Herbicides, commonly used in agriculture to control weeds, often cause negative effects on crops. Safeners are applied to reduce the damage to crops without affecting the effectiveness of herbicides against weeds. Plant biostimulants have the potential to increase tolerance to a series of abiotic stresses, but very limited information exists about their effects on herbicide-stressed plants. This study aims to verify whether the application of a potential safener such as Terra-Sorb®, an L-α-amino acid-based biostimulant, reduces the phytotoxicity of an Imazamox-based herbicide and to elucidate which tolerance mechanisms are induced. Sunflower plants were treated with Pulsar® 40 (4% Imazamox) both alone and in combination with Terra-Sorb®. Plants treated with the herbicide in combination with Terra-Sorb® showed higher growth, increased acetolactate synthase (ALS) activity, and amino acid concentration with respect to the plants treated with Imazamox alone. Moreover, the biostimulant protected photosynthetic activity and reduced oxidative stress. This protective effect could be due to the glutathione S-transferase (GST) induction and antioxidant systems dependent on glutathione (GSH). However, no effect of the biostimulant application was observed regarding phenolic compound phenylalanine ammonium-lyase (PAL) activity. Therefore, this study opens the perspective of using Terra-Sorb® in protecting sunflower plants against an imazamox-based herbicide effect.
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Claims 7
Claim · model-written summary
Terra-Sorb with imazamox increased sunflower growth relative to imazamox alone.
- Taxon
- Sunflower
Helianthus annuust0 - Treatment
- the herbicide in combination with Terra-Sorb®e0
- Outcome
- growthe0
- Direction
- highere0
- Comparator
- the plants treated with Imazamox alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants treated with the herbicide in combination with Terra-Sorb® showed higher growth, increased acetolactate synthase (ALS) activity, and amino acid concentration with respect to the plants treated with Imazamox alone”
t0“Sunflower”
Claim · model-written summary
Terra-Sorb with imazamox increased ALS activity relative to imazamox alone.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- the herbicide in combination with Terra-Sorb®e0
- Gene
- acetolactate synthase (ALS)e0
- Outcome
- acetolactate synthase (ALS) activitye0
- Direction
- increasede0
- Comparator
- the plants treated with Imazamox alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants treated with the herbicide in combination with Terra-Sorb® showed higher growth, increased acetolactate synthase (ALS) activity, and amino acid concentration with respect to the plants treated with Imazamox alone”
t0“Sunflower”
Claim · model-written summary
Terra-Sorb with imazamox increased amino acid concentration relative to imazamox alone.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- the herbicide in combination with Terra-Sorb®e0
- Outcome
- amino acid concentratione0
- Direction
- increasede0
- Comparator
- the plants treated with Imazamox alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants treated with the herbicide in combination with Terra-Sorb® showed higher growth, increased acetolactate synthase (ALS) activity, and amino acid concentration with respect to the plants treated with Imazamox alone”
t0“Sunflower”
Claim · model-written summary
The biostimulant protected photosynthetic activity.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- the biostimulante0
- Outcome
- photosynthetic activitye0
- Direction
- protectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, the biostimulant protected photosynthetic activity and reduced oxidative stress”
t0“Sunflower”
Claim · model-written summary
The biostimulant reduced oxidative stress.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- the biostimulante0
- Outcome
- oxidative stresse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, the biostimulant protected photosynthetic activity and reduced oxidative stress”
t0“Sunflower”
Claim · model-written summary
The authors proposed GST induction and glutathione-dependent antioxidant systems as a possible basis of protection.
- Taxon
- SunflowerHelianthus annuust0
- Gene
- glutathione S-transferase (GST)e0
- Compound
- glutathione (GSH)e0
- Outcome
- This protective effecte0
- Qualifier
- antioxidant systems dependent on glutathione (GSH)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This protective effect could be due to the glutathione S-transferase (GST) induction and antioxidant systems dependent on glutathione (GSH)”
t0“Sunflower”
Claim · model-written summary
Biostimulant application had no observed effect on PAL activity.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- the biostimulant applicatione0
- Gene
- phenylalanine ammonium-lyase (PAL)e0
- Outcome
- phenylalanine ammonium-lyase (PAL) activitye0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no effect of the biostimulant application was observed regarding phenolic compound phenylalanine ammonium-lyase (PAL) activity”
t0“Sunflower”
The same questions in other papers
other · molecular: metabolites · Helianthus annuus (common sunflower)Positive and negative results
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herbicide · growth · Helianthus annuus (common sunflower)Positive and negative results
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See all 22 papers →other · physiology: oxidative · Helianthus annuus (common sunflower)Results agree
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herbicide · molecular: metabolites · Helianthus annuus (common sunflower)Results agree
4 papers in the same direction as this paper
- positive
- positive
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See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.